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Use of PINS C6&C7 as output in PIC184550 + USB Enabled

 
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younder



Joined: 24 Jan 2013
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Location: Brazil

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Use of PINS C6&C7 as output in PIC184550 + USB Enabled
PostPosted: Sat Apr 06, 2013 4:05 pm     Reply with quote
Does anyone know if I can use the two mentioned pins(C6 and C7) in PIC18F4550 as output with USB function enabled? I have tested it with a single output_toggle function, but it did not work..... I know that C4 and C5 cannot be used as Input when USB active, but what about 6&7? Any help would be appreciated!

Hugo
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Hugo Silva
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Sat Apr 06, 2013 4:30 pm     Reply with quote
Quote:
I have tested it with a single output_toggle function, but it did not work
Post a little test program that shows this.

Example of a short, complete test program for 18F4550:
http://www.ccsinfo.com/forum/viewtopic.php?t=49056&start=14

Also post your CCS compiler version if you know it.
temtronic



Joined: 01 Jul 2010
Posts: 9169
Location: Greensville,Ontario

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PostPosted: Sat Apr 06, 2013 7:21 pm     Reply with quote
...according to the datasheet, table 1-2, both C6 and C7 can be used for digital I/O but have ST not TTL buffers.

we'd have to see your code to figure out what you're doing wrong....

hth
jay
Ttelmah



Joined: 11 Mar 2010
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PostPosted: Sun Apr 07, 2013 4:27 am     Reply with quote
Obvious things would be either the UART is enabled, or SPI.

Best Wishes
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